package maplearn;

import java.util.HashMap;
import java.util.Map;

public class Demon2 {
	
	public static void main(String[] args) {
		Map<String, Integer> map = new HashMap<>();
		
		map.put("11", 22);
		map.put("11", 33);
		//改变map里的值，replace,put都行
		System.out.println(map.get("11"));
		System.out.println(map.get("22"));
	}

}
